Nuprl - Proof: decidable l exists 2 1

IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At: decidable l exists 2 1

1. A : Type
2. F : A

Prop
3. A List
4.

k:A. Dec(F(k))
5. u : A
6. v : A List
7. Dec((

v.F(k)))

Dec(F(u)

(

v.F(k)))

By:	AllHyps (InstHyp [u]) THEN ProveDecidable

Generated subgoals:

None

About:

IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html